Better early than never: A new test for superluminal gravitational wave polarizations Article Swipe

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Kristen Schumacher , C. Talbot , D. E. Holz , Nicolás Yunes ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2501.18125

In some beyond-Einstein theories of gravity, gravitational waves can contain up to six polarizations, which are allowed to propagate at different speeds faster than light. These different propagation speeds imply that polarizations generated by the same source will not arrive simultaneously at the detector. Current constraints on the speed of propagation of transverse-traceless polarizations, however, indicate that any additional polarizations must arrive with or before the transverse-traceless ones. We propose a new technique to test for the existence of superluminal, non-transverse-traceless polarizations that arrive in the data before a gravitational-wave observation of transverse-traceless modes. We discuss the circumstances in which these non-transverse-traceless polarizations would be detectable and what constraints could be placed if they are not detected. To determine whether this new test of general relativity with gravitational wave observations is practical, we outline and address many of the challenges it might face. Our arguments lead us to conclude that this new test is not only physically well-motivated but also feasible with current detectors.

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Superluminal motion Gravitational wave Physics Test (biology) Astronomy Geology Paleontology

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2501.18125
PDF: https://arxiv.org/pdf/2501.18125
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W4407021127

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DOI: https://doi.org/10.48550/arxiv.2501.18125

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Title: Better early than never: A new test for superluminal gravitational wave polarizations

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Type: preprint

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Language: en

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Publication year: 2025

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Publication date: 2025-01-30

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Authors: Kristen Schumacher, C. Talbot, D. E. Holz, Nicolás Yunes

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Landing page: https://arxiv.org/abs/2501.18125

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PDF URL: https://arxiv.org/pdf/2501.18125

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OA status: green

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OA URL: https://arxiv.org/pdf/2501.18125

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Concepts: Superluminal motion, Gravitational wave, Physics, Test (biology), Astronomy, Geology, Paleontology

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Cited by: 0

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Related works (count): 10

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